Wanting both my wife and marriage to succeed

My wife and I have been together for 5 years and married for 3. I'll be the first to admit to the world I'm no easy task to deal with at times and I'm not perfect but I will say I do keep trying with an open mind. This is my wife's 1st semester in nursing school and it's already causing problems between us. Our child has started having behavior issues in school with violence and as a married couple I've developed some jealous feelings not of her school but classmates. I take care of our kid, feed him, give him baths, pick him up, do all laundry, dishes, vacuuming, picking up toys.....I'm trying hard, very very hard. I see that many couples go through this hardship. I've tried to sit and rationally talk to her when I have concerns and sometimes it works out but mostly due to her stress it ends with her shutting down and nothing is resolved, more like it's festering until the boil pops.
Is there any advice that you great life saving people can give me to help?
Thanks